摘要
由于煤层气藏特殊的赋存及渗流方式,使其有别于常规气藏,而煤层气藏开采初期的多相渗流问题使其产能预测更为复杂。在定容煤层气藏物质平衡法基础上,利用历史生产数据完成线性拟合,并用拟合得到的参数对未来生产动态进行预测。通过将模型预测的平均地层压力、平均含水饱和度及产气、产水量随时间变化与CMG数值模拟结果进行对比分析,结果显示,本文方法预测结果较为准确可靠,尤其是在煤层气峰值产量之后。
The study of the production dynamics for coal-bed methane reservoir is very valuable for it differs from normal gas reservoir in its specific manner of storage and the mechanics of flow through porous media,and multi-phase flow in the earlier stage of production makes it more complicated.In this paper,the history production data were firstly analyzed by history matching,and the future production dynamics were predicted based on these matched parameters.By comparisons of the predicted average pressure,water saturation and rates of gas and water with simulated values by CMG,it＇s reliable to predict the production dynamics of CBM reservoir by the proposed method,especially after the peak of gas production.The limits of material balance method and their influences are also analyzed when applied for this forecast.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2011年第3期29-32,共4页
Coal Geology & Exploration
基金
国家科技重大专项课题(2008ZX05038-005)
关键词
煤层气
生产动态
物质平衡法
历史拟合
预测
coal-bed methane reservoir
production dynamic
material balance
history match
forecast
